Improvement in drilling and screw-cutting machines



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inf/2'71; fiaiz'm N. PETERS, PHOTO-LITHOGRAPHER, WASHINGTON D C UNITE-I)STATES PATENT OFFICE.

.CHARLES'W. ,OOE, OF CORUNNA, MICHIGAN.

IMPROVEMENTIN DRILLING AND SCREW-CUTTING MACHINES.

Specification forming part of Letters Patent No. 37,433, dated J auuary20, 1863.

To all whom it may concern:

Be it known that 1, CHARLES W. 00E, of Oorunna, in the county ofShiawassee and State of Michigan, have invented a new and ImprovedDrilling and Screw'Outting Machine; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanyin g drawings, making a part of thisspecification, in which- Figure 1 is a side view of my invention. Fig. 2is a plan or top view of the same, a screw pertaining to the inventionbeing bisected horizontally, as shown at a: w in Fig. 1; Fig. 3, adetached central vertical section of a clamp and bed pertaining to thesame.

Similar letters of reference indicate corresponding parts in the severalfigures.

This invention relates to a novel and improved arrangement of parts, ashereinafter fully shown and described, whereby a very simple and compactmachine is obtained for the purpose of drilling and cutting screws, andone by which it is believed several advantages are obtained over thosenow in use.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A represents a cast-metal frame or support, which is firmly secured toany suitable fixture, and B is a shaft, which is fitted horizontally inthe upper part of the frame'or support A, and has a fly-wheel, O, at oneend of it and a bevel-pinion, D, at the opposite end. The pinion D gearsinto a bevel-wheel, E, the shaft F of which is fitted in suitablebearings on the upper part of the frame or support A and at right anglesto shaft B, as shown clearly in Fig. 2. The outer end of the shaft F isprovided with a crank, G.

H is a bevel-pinion, which also gears into the wheel E. This pinion isfitted loosely on the shaft I, or in such a manner that the shaft mayrise and fall independently of the wheel, and the latter at the sametime made to rotate said shaft. The shaft I is tubular at its lower end,and is provided with a set-screw, J, by which a drill or screw-cuttingdie may be secured in it.

K is a vertical screw, which works in a nut,

L, on the upper part of the frame or support A. The lower end of thisscrew is connected by a swivel-joint with the upper end of the shaft I.On the screw K, above the nut L, there is placed a ratchet, M. Thisratchet is fitted on the screw K in such a manner that it when turnedwill turn the screw, and at the same time admit of the latter rising andfalling under the action of the nut L. The ratchet M is turned by meansof a pawl, N, which is connected by means of a pivot, a, to an arm, 0,the latter being attached to the frame or support A by a pivot, Z Aspring, P, is connected to the arm 0, and this spring has a tendency tokeep the outer or freetend of the pawl N in contact with the face of thewheel E, which is of such a shape as to form a cam, Q, and operate thepawl N so that the latter will turn the ratchet M, the latter as itrotates turning the screw K, the nut L causing the same to descend as itis turned, so that the shaft I will be forced down and the drill fed toits work. The base R of the frame or support A has an oblong opening, a,made through it vertically to receive the shanks b b of two jaws, S S,one of which, S, has the ends of a yoke, T, bolted to it. Through thesemicircular end of this yoke a screw, U, passes, said screw alsopassing into thejaw S. These jaws S S are for the purpose of clamping orholding the rods on which screws are to be out, (see Fig. 3,) the rod Vbeing placed between the jaws and secured or clamped firmly between themby turning the screw U. The screw-cutting die W is secured in the lowerend of the shaft I, and the pawl N is disengaged from the ratchet M, asno feed-movement is required in this arrangement, the jaws S S and rod Vrising and falling under the action of the die W, the shanks b b of thejaws serving as guides for the same.

The whole arrangement, it will be seen, is extremely simple, occupiesbut a small space, may be manufactured at a small cost, and at any time,when more power is required for either drilling or screw-cutting thancan be obtained by turning the wheel E, the power may be applied to theshaft B, the increase of power in the latter case being due to thesmallness of the diameter of the bevel-pinion and falling jaws S S, allarranged for joint D relatively with that of wheel E. operation, as and.for the purpose herein set Having thus described my invention, whatforth. I claim as new, and desire to secure by Letters Patent, is-

The combination of the gearing D E H Witnesses: with the screw K,ratchet M, adjustable pawl N, shaft I, cam Q, and the moving or risingCHARLES W. OOE.

EBENEZER F. WADE, L. D. PHELPS.

